Quoth Mario Mey, on 07/08/2013 20:32:
Ready-to-use, 2 FXs on: 26% (there are 2 FXs always on, although they are muted)
Are the effects that are always on [freeverb]? This could consume CPU, see these threads:

http://www.mail-archive.com/pd-list@iem.at/msg27143.html
http://www.mail-archive.com/pd-list@iem.at/msg56905.html